Results 21 to 30 of about 179,998 (300)
Chemical and Dynamical History of the Milky Way [PDF]
Symposium - International Astronomical Union, 1996 F-G dwarf stars of different metallicity are used as tracers of chemical and dynamical history of the Galaxy. Observed ratios of element abundances “[X/Fe] versus [Fe/H]” (where “X” is a some of chemical element) are compared with theoretical ones and allow us to make the choice between models (or parameters of theoretical models) of the Galaxy ...
I.F. Bikmaev +4 more
openaire +1 more source
The history of dynamics and stellar feedback revealed by the H I filamentary structure in the disk of the Milky Way [PDF]
Astronomy & Astrophysics, 2020 We present a study of the filamentary structure in the emission from the neutral atomic hydrogen (HI) at 21 cm across velocity channels in the 40′′ and 1.5-km s−1 resolution position-position-velocity cube, resulting from the combination of the single ...
J. Soler +21 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 In the Λ-Cold Dark Matter model of the universe, galaxies form in part through accreting satellite systems. Previous works have built an understanding of the signatures of these processes contained within galactic stellar halos.
Danny Horta +9 more
doaj +1 more source
Dynamics and history of the Milky Way [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractThe structure and dynamics of the Galaxy contain information about both its current workings and its assembly history. I review our understanding of the dynamics of the disk and stellar halo, and sketch how these may be used to unravel how our Galaxy formed.
openaire +2 more sources
The role of galactic dynamics in shaping the physical properties of giant molecular clouds in Milky Way-like galaxies [PDF]
, 2020 We examine the role of the large-scale galactic-dynamical environment in setting the properties of giant molecular clouds in Milky Way-like galaxies. We perform three high-resolution simulations of Milky Way-like discs with the moving-mesh hydrodynamics ...
Sarah M. R. Jeffreson +4 more
semanticscholar +1 more source
On the Origin of Dynamically Cold Rings around the Milky Way [PDF]
The Astrophysical Journal, 2008 We present a scenario for the production of dynamically cold rings around the Milky Way via a high-eccentricity, flyby encounter. These initial conditions are more cosmologically motivated than those considered in previous works. We find that the encounters we examine generically produce a series of nearly dynamically cold ring-like features on low ...
Younger, Joshua D. +5 more
openaire +4 more sources
Dynamical Model of the Milky Way Using APOGEE and Gaia Data [PDF]
The Astrophysical Journal, 2021 Abstract We construct a dynamical model of the Milky Way disk from a data set that combines Gaia EDR3 and APOGEE data throughout galactocentric radii in the range 5.0 kpc ≤ R ≤ 19.5 kpc. We make use of the spherically aligned Jeans anisotropic method to model the stellar velocities and their velocity dispersions.
Maria Selina Nitschai +4 more
openaire +2 more sources
Dynamics of tidal spiral arms: Machine learning-assisted identification of equations and application to the Milky Way [PDF]
Understanding the spiral arms of the Milky Way (MW) remains a key open question in galactic dynamics. Tidal perturbations, such as the recent passage of the Sagittarius dwarf galaxy (Sgr), could play a significant role in exciting them.
M. Bernet +6 more
semanticscholar +1 more source
Analysis of regularity/chaoticity of the Globular ckusters dynamics in the central region of the Milky Way [PDF]
Publications of the Pulkovo_ObservatoryWe analyzed the regularity/chaoticity of the orbits of 45 globular clusters in the central region of the Galaxy with a radius of 3.5 kpc, which are subject to the greatest influence from an elongated rotating bar.
Anisa Bajkova, A. Smirnov, Vadim Bobylev
semanticscholar +1 more source
Overview of the DESI Milky Way Survey
The Astrophysical Journal, 2023 We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory.
Andrew P. Cooper +64 more
doaj +1 more source